India, Nov. 14 -- The three doctors linked to Faridabad's Al Falah University, who are under scanner for the deadly car blast near the Red Fort on Monday evening, were in constant contact through a Swiss communication app called Threema.

The three suspects - Dr Umar Un Nabi, Dr Muzammil Ganaie, and Dr Shaheen Shahid - allegedly used the encrypted messaging app to plan and coordinate their activities related to the terror conspiracy, they said.

Investigators also suspect that Umar, the man behind the wheel of the car that exploded on Monday, and his team used a red EcoSport car, which has been seized from Faridabad, to transport and stockpile ammonium nitrate over time.

Describing Umar as the most radicalised member of the module and th...